Research on Fire Extinguishing Technology of Fully Mechanized Caving Face in Inflammable Thick coal Seam during Withdraw Period

摘要

According to the actual situation of a large amount of residual coal, big volume of air leakage and long cycle length of fully mechanized caving face during withdraw period, which cause high risk of spontaneous combustion in goaf and threat the safety production seriously, based on the analysis of the law of spontaneous combustion at fully mechanized caving face, the dangerous zone of spontaneous combustion in 2103 working face was determined and fire extinguishing technology was formed which included prediction technology of spontaneous combustion, pressure balance technology, preemptive inerting coal technology and nitrogen injection against fire during withdraw period. Combined with the application of emergency security technology, spontaneous combustion accidents were avoided and the safety and stability of the working face were ensured during withdraw period.